Definition of better noun from the Oxford Advanced Learner's Dictionary

      

    better

     noun
    noun
    BrE BrE//ˈbetə(r)//
     
    ; NAmE NAmE//ˈbetər//
     
     
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  1. 1  [singular, uncountable] something that is better the better of the two books I expected better of him (= I thought he would have behaved better).
  2. 2your betters [plural] (old-fashioned) people who are more intelligent or more important than you
  3. Word Origin Old English betera (adjective), of Germanic origin; related to Dutch beter and German besser, also to best.Idioms
    a change for the better/worse
     
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    a person, thing, situation, etc. that is better/worse than the previous or present one Voters see the new leader as a change for the better.
    your elders and betters
     
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    people who are older and wiser than you and whom you should respect
    for better or (for) worse
     
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    used to say that something cannot be changed, whether the result is good or bad
    get the better of somebody/something
     
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    to defeat somebody/something or gain an advantage No one can get the better of her in an argument. She always gets the better of an argument. His curiosity got the better of him (= he didn't intend to ask questions, but he wanted to know so badly that he did).
    so much the better/worse
     
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    used to say that something is even better/worse We don't actually need it on Tuesday, but if it arrives by then, so much the better.
    think (the) better of somebody
     
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    to have a higher opinion of somebody She has behaved appallingly—I must say I thought better of her.
See the Oxford Advanced American Dictionary entry: better